Its not a great one, but I know the rules so there is a diagram attached.
One way car park with arrows marking the route. One way in/out so as you go to exit you give way to anyone coming in (red line).
Yellow cross car stops at give way line, sees no one is coming in and goes. Green car going wrong way on one way, crash.
Interested in thoughts, will obviously be down to insurance companies.
The give way bit isn’t a sign but two rows of dotted lines if that makes any difference…